Hurdity, they did attempt to fit another Mirena but my cervix was having none of it. They suggested I could go to the hospital to have it fitted with a local anaesthetic but I can't say I was happy at that suggestion!
Dorothy, I sincerely hope that's the case.
I'm going to go and get my bloods checked again, probably next week when I have more time, and see where I'm up to then. I may try the coil again as I've been almost 12 months without it now so my cervix may be more responsive.
thanks for your welcomes and responses